Tire.



G. H. GILLETTE.

' TIRE. Arrmonlon rum APR. 9, 190a Patented July 27, 1909.

GEORGE E. GILLETTE,

TOE-NEW YORK, N. Y.

- TIRE.

Specification of Letters Patent. application filed April 9, 1909. SerialNo. 488,823.

Patented July 27,19,09'.

I '0 alll'whom it mai concern: @Be it known that I, GEORGE II GILLETTE,a citizen of the United States, residing at NewYo rk, in the county ofNew .York'and State ofNew York, have invented'certain new and usefulImprovements in Tires, of which the following is a specification.

This invention relates .to tires, and it relate's particularly tothatclass of these articlsfwhich are designed. for use on automobilesand similar vehicles.

The object of the invention is to providea tire of the characterreferred to which shall be simple and comparatively vchea inconstruction and which shall possess al the advantages and none of thedefects of the pneumatic or cushion tires in common-use.

With this object in view the invention consists essentially of a tirehaving an outer covering 0r tread of any suitablematcrial orcombinations of materials, and a core having a projecting spiral ribextending around the core.

The invention is illustrated in the accompanying drawing, in which;

Figure 1 is a perspective view of a portion of a tiremade in accordancewith my inven- 'tion showing in section the arrangement of the corewithin a covering or tread; Fig. 2 is a view similar to Fi 1 showingmy-core applied to an inner tu e introduced into a covering of difierentconstruction than that shown in Fig. 1, and Fig. 3 is a fragmentary viewshowing the form' of the improved core.

In this drawing 1 represents the body of the core which may be made instraight pieces ada ted: to be cut into re uired engths, be ent intocircular form, an have their ends connected by cement or other Wise, orwhich may bemolded in circular form of the required diameter to beinclosed by the. cover in connection with which they are to be used. Thebody- 1 of the core has projecting therefrom a spiral rib 2 which may bemade in a se arate piece and of. different material than t e body 1 andattached thereto. I prefer however to make the parts integra and of thesame material thus"al lowing their being made in one operation as bymolding. The rib may be of any desired height, the preferred form beingsubstan tially as shown in the drawing wherein the rib projects from thecore a distance approximately corresponding to the diameter of thebody 1. The pitch of the spiral of the varying Weights.-

vehicles of medium weight thespaces beconvolutions.

rib maybe varied to adapt the tire of which the core forms a part to useon vehicles of- When made for use. on

tween the convolutions are substantially the same as the width of theouter face of the rib. For use on heavier vehicles the spaces betweenthe convolutions may be less, or the outer face of the rib may be madewider and the same or a less space be left between the preferablyprovided with indentations 3 placed at equal distances'apart throughoutthe length of the rib. The core body and rib whether formed in oneoperation or made separately and connected are of some dura ble elasticmaterial, caoutchouc either alone or combined. with other substancesbeing preferably employed. The core of the form described may be use'din connection with an outer tube or covering of any suitable form.

or material. For instance as shown in Fig. 1 it may be inclosed by atube 4 'of rubber having a smooth inner face and having a pro-' tectedtread.- Again, it may be inclosed in an inner tube 5which fits closelyto the rib, and the tube may in turn be inclosedby an- The outer face ofthe rib isouter tube 6 formed with anouterface of rubber having an innerstrengthening layer 7' of heavy canvas against which the inner tubebears;

In the use of tires having my core arranged therein the entire weight ofthe vehicle to which the tires areapplicd comes upon the spiral rib, andas this by reasons of lts form and of the material of Which'it is made,is 1 yielding in all directions and a the same time forms a continuousbearin surface,

shocks or jars to the-tires are absorbed by the core and thus areprevented fro1n being transferred to the occupants of the vehicle.

In any arrangementof the core'w'ithin a "tire the rib is preferably heldby a. covering closely confining the corel and having a smooth surfaceagainst which the rib abuts. Thus as the rib is depressed more 01', lessof the air isforced from the indentations forming a partial vacuum inthem and causing the rib to adhere closely to its covering therebypreventing displacement of the rib in reference to other parts of the'tire. Iiaving thus described-my invention, what I claim asnew, anddesire to'secure by Letters Patent, is I 1. A' core. for tires having anintegral spiral rib extending from its outer face, subrib provided withindentations,- and a coverstantially as described. ing closely inclosingthe core, substantially 2. A core for tires composed of resilient asdescribed.

material and having an integral spiral rib eX- In testimony whereof Iafiix my signature 5 tending from its outer face, substantially as inpresence of two witnesses. described.

,3. A core for tires having a spiral rib pro- GEORGE GILLETTE outer'facesubstantiall as described. D. C. WHEARTY vided with indentationsextending from its WVitnesses:

1o 4 A tire comprising a core having a spiral LEON L. GURNBINER.

